I'd like to use websockets in my web application. Right now my websocket disconnects and reconnects every 30 seconds, which is the default timeout in GKE Ingress. I tried the following to change timeout values:

metadata:
  name: my-ingress
  annotations:
    nginx.ingress.kubernetes.io/proxy-connect-timeout: "300"
    nginx.ingress.kubernetes.io/proxy-send-timeout: "3600"
    nginx.ingress.kubernetes.io/proxy-read-timeout: "3600"
    nginx.org/proxy-connect-timeout: "300"
    nginx.org/proxy-read-timeout: "3600"
    nginx.org/proxy-send-timeout: "3600"

After recreating the ingress through kubectl the timeout value remains 30 seconds:

I also tried to create a backend configuration as described here: https://cloud.google.com/kubernetes-engine/docs/how-to/configure-backend-service

The timeout value still remained unchanged at 30 seconds.

Is there a way to increase timeout value through annotations in .yml file? I could edit the timeout value through the web interface but I'd rather use .yml files.